FYI... I've filed this as "Bug 958415"
https://bugzilla.redhat.com/show_bug.cgi?id=958415
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From: Miner, Jonathan W (US SSA)
Sent: Monday, April 29, 2013 14:39
To: Community support for Fedora users
Subject: RE: Problem with external VGA
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From: John Pilkington [J.Pilk(a)tesco.net]
Sent: Monday, April 29, 2013 08:16
To: users(a)lists.fedoraproject.org
Subject: Re: Problem with external VGA
On 29/04/13 12:48, Miner, Jonathan W (US SSA) wrote:
I've got a Dell Precision M4600 laptop, running Fedora 17.
Sometime
after kernel 3.7.9-104, the external VGA output no longer works.
If I boot with 3.7.9-104,with my projector attached, it is recognized.
If I boot with 3.8.4-102, external VGA devices are not recognized.
lspci:
01:00.0 VGA compatible controller: nVidia Corporation GF108 [Quadro
1000M] (rev a1)
(I've tried running the driver from nVidia, but that has screen
rendering problems, with blocks of random data instead of my normal
background pic)
- Jon
/var/log/Xorg.0.log ought to show what's happening. Or 0 ... to 9.
'the driver from nvidia'? Which one? but perhaps you want to run nouveau?
------
The Xorg logs from the 3.7.9-104 kernel clearly show that the VGA is detected:
[ 48.288] (II) NOUVEAU(0): Printing probed modes for output VGA-1
[ 48.288] (II) NOUVEAU(0): Output VGA-1 connected
The Xorg logs from the 3.8.3-103 (and newer 3.8.4-102) kernels, show the driver believes
the VGA is not connected:
[ 46.357] (II) NOUVEAU(0): Output VGA-1 disconnected
Starting to look like the driver was changed between 3.7 and 3.8 kernels?
- Jon